N249M Dell Active 255W Proprietary PSU

High-Reliability Proprietary Form Factor Power Supply Unit for Dell Platforms with the N249M

The N249M is a Dell proprietary form factor 255W AC power supply unit engineered for service replacement in compatible Dell systems where stable, standards-compliant power delivery is required. Designed for 100–240V input environments, the N249M supports global data centre and enterprise edge deployments by maintaining consistent regulation under typical low to moderate load profiles.

Within entry server and legacy platform configurations, the N249M aligns with predictable CPU, memory, and storage power envelopes, ensuring clean delivery to motherboard and peripheral rails without oversizing. Fixed cabling reduces connector variability and simplifies field swaps, while the provided outputs—including a 24-pin ATX lead, an internal 4-pin power connection, and multiple SATA power feeds—support common backplane and boot-device layouts. Integrated protections such as OVP, OCP, and SCP help safeguard system boards, drives, and expansion devices during fault conditions, supporting operational continuity in enterprise estates.

Why Choose the N249M?

The N249M provides a controlled, validated replacement path that preserves the electrical and mechanical compatibility profile expected by Dell chassis designs. For IT teams standardising spares, the N249M supports density-to-serviceability goals by enabling rapid restoration of affected nodes, reducing mean time to repair, and maintaining consistent power characteristics across fleets.

Dell designs service PSUs to support long operational lifecycles, predictable tolerances, and repeatable integration with platform firmware and chassis management expectations. The N249M reflects this engineering approach with a pragmatic power budget, broad input range, and protection mechanisms aligned with modern enterprise reliability requirements.

Key Applications:

• Replacement PSU for compatible Dell servers
• Legacy platform maintenance and lifecycle support
• Enterprise IT spares inventory standardisation
• Edge deployments with low to moderate power budgets

At Happyware - Server Hardware you benefit from non-binding offers tailored to your fleet requirements for the N249M and from an extended warranty option up to 6 years to strengthen operational planning for long-lived Dell installations.